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Finding the Fourth Proportional to 421.96, 582.56 and 323.92

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Solution

The fourth proportional to 421.96, 582.56 and 323.92 is: 447.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    421.96 : 582.56 = 323.92 : x
  2. Step 2: Convert to fraction form
    421.96/582.56 = 323.92/x
  3. Step 3: Cross multiply
    421.96x = 582.56 × 323.92
  4. Step 4: Simplify right side
    421.96x = 188,702.84
  5. Step 5: Solve for x
    x = 188,702.84/421.96
  6. Step 6: Final answer
    x = 447.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.